/*
 * Copyright (c) 2004-2022, University of Oslo
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 * Neither the name of the HISP project nor the names of its contributors may
 * be used to endorse or promote products derived from this software without
 * specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.hisp.dhis.security.oidc;

import java.util.Map;
import lombok.extern.slf4j.Slf4j;
import org.hisp.dhis.user.User;
import org.hisp.dhis.user.UserDetails;
import org.hisp.dhis.user.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.oauth2.client.oidc.userinfo.OidcUserRequest;
import org.springframework.security.oauth2.client.oidc.userinfo.OidcUserService;
import org.springframework.security.oauth2.client.registration.ClientRegistration;
import org.springframework.security.oauth2.core.OAuth2AuthenticationException;
import org.springframework.security.oauth2.core.OAuth2Error;
import org.springframework.security.oauth2.core.oidc.IdTokenClaimNames;
import org.springframework.security.oauth2.core.oidc.OidcUserInfo;
import org.springframework.security.oauth2.core.oidc.user.OidcUser;
import org.springframework.stereotype.Service;

/**
 * @author Morten Svanæs <msvanaes@dhis2.org>
 */
@Slf4j
@Service
public class DhisOidcUserService extends OidcUserService {
  @Autowired public UserService userService;

  @Autowired private DhisOidcProviderRepository clientRegistrationRepository;

  @Override
  public OidcUser loadUser(OidcUserRequest userRequest) throws OAuth2AuthenticationException {
    OidcUser oidcUser = super.loadUser(userRequest);

    ClientRegistration clientRegistration = userRequest.getClientRegistration();

    DhisOidcClientRegistration oidcClientRegistration =
        clientRegistrationRepository.getDhisOidcClientRegistration(
            clientRegistration.getRegistrationId());

    String mappingClaimKey = oidcClientRegistration.getMappingClaimKey();
    Map<String, Object> attributes = oidcUser.getAttributes();
    Object claimValue = attributes.get(mappingClaimKey);
    OidcUserInfo userInfo = oidcUser.getUserInfo();
    if (claimValue == null && userInfo != null) {
      claimValue = userInfo.getClaim(mappingClaimKey);
    }

    if (log.isDebugEnabled()) {
      log.debug(
          String.format(
              "Trying to look up DHIS2 user with OidcUser mapping mappingClaimKey='%s', claim value='%s'",
              mappingClaimKey, claimValue));
    }

    if (claimValue != null) {
      User user = userService.getUserByOpenId((String) claimValue);
      if (user != null && user.isExternalAuth()) {
        if (user.isDisabled() || !user.isAccountNonExpired()) {
          throw new OAuth2AuthenticationException(
              new OAuth2Error("user_disabled"), "User is disabled");
        }

        UserDetails userDetails = userService.createUserDetails(user);

        return new DhisOidcUser(
            userDetails, attributes, IdTokenClaimNames.SUB, oidcUser.getIdToken());
      }
    }

    String errorMessage =
        String.format(
            "Failed to look up DHIS2 user with OidcUser mapping mapping; mappingClaimKey='%s', claimValue='%s'",
            mappingClaimKey, claimValue);

    if (log.isDebugEnabled()) {
      log.debug(errorMessage);
    }

    OAuth2Error oauth2Error =
        new OAuth2Error("could_not_map_oidc_user_to_dhis2_user", errorMessage, null);

    throw new OAuth2AuthenticationException(oauth2Error, oauth2Error.toString());
  }
}
